Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A virtual antenna mapping (VAM) method of a base station equipped with M physical antennas and Q transceiver units (TXRUs), the method comprising: transmitting, to a terminal, information on at least one VAM pattern, each VAM pattern being associated with mapping between at least one physical antenna and at least one data stream; transmitting reference signals (RSs) to the terminal; receiving, from the terminal, a feedback including information regarding a VAM pattern selected among the at least one VAM pattern based on channel measurement with respect to the RSs transmitted; and transmitting a signal to the terminal through the M physical antennas by applying the selected VAM pattern.
A base station with M physical antennas and Q transceiver units (TXRUs) performs virtual antenna mapping (VAM). It transmits information about one or more VAM patterns to a terminal. Each VAM pattern defines how data streams are mapped to physical antennas. The base station also sends reference signals (RSs) to the terminal. The terminal measures the channel based on these RSs and selects a VAM pattern. The terminal sends feedback to the base station indicating which VAM pattern was selected. Finally, the base station transmits a signal to the terminal using the selected VAM pattern to control which physical antennas are used for transmission.
2. The method of claim 1 , wherein the feedback is received periodically at a feedback interval that is determined based on at least one of a network status, a channel status, and a performance change caused by change of the VAM patterns.
The virtual antenna mapping (VAM) method from the previous description, where a base station transmits information about VAM patterns and receives feedback from a terminal about which pattern is best, has the base station receive feedback periodically from the terminal. The time between feedbacks is determined by network status, channel status, or performance changes due to VAM pattern changes. For example, if the channel is rapidly changing, feedback will be more frequent.
3. The method of claim 1 , wherein the feedback is received periodically or aperiodically in response to a request of the base station or when a VAM pattern information feedback event occurs at the terminal.
A method for managing feedback in wireless communication systems addresses the challenge of efficiently transmitting feedback information between a base station and a terminal. The method involves receiving feedback from the terminal regarding virtual antenna mapping (VAM) pattern information, which is used to optimize signal transmission and reception. The feedback can be triggered in multiple ways: periodically, aperiodically in response to a request from the base station, or when a predefined feedback event occurs at the terminal. This ensures timely and adaptive adjustments to the VAM patterns based on changing channel conditions or network demands. The method supports dynamic configuration of feedback timing and content, allowing the base station to request specific feedback when needed or rely on autonomous reporting from the terminal. This approach enhances system efficiency by reducing unnecessary feedback transmissions while ensuring critical information is available for optimal performance. The solution is particularly useful in advanced wireless systems where precise antenna mapping is essential for maintaining high data rates and reliability.
4. The method of claim 1 , wherein the VAM pattern information comprises an index corresponding to the selected VAM pattern that is retrieved from a VAM table that includes the at least one VAM pattern and the index corresponding to the at least one VAM pattern and the VAM table is determined based on at least one of a feedback overhead, a number of bits used for feedback, a number of antennas, an antenna structure, an antenna correlation, and a channel correlation.
In the virtual antenna mapping (VAM) method where a base station transmits information about VAM patterns and receives feedback from a terminal, the feedback includes an index representing the selected VAM pattern. This index is looked up in a VAM table stored at the terminal and base station, which contains all possible VAM patterns and their corresponding indices. The VAM table's contents (available VAM patterns and indices) are determined based on factors like feedback overhead (amount of data needed for feedback), number of bits used for feedback, number of antennas, antenna structure, antenna correlation, and channel correlation.
5. The method of claim 1 , wherein the VAM pattern is one of: a pattern corresponding a VAM pattern matrix V of which non-zero elements are identical in size and in which sums of sizes of elements of respective rows are identical, and a pattern formed by grouping adjacent antennas among the M physical antennas.
In the virtual antenna mapping (VAM) method where a base station transmits information about VAM patterns and receives feedback from a terminal, the VAM pattern is either: 1) a pattern corresponding to a VAM pattern matrix V where all non-zero elements have the same size and the sum of the sizes of elements in each row is the same; or 2) a pattern formed by grouping adjacent antennas among the M physical antennas.
6. The method of claim 1 , wherein the VAM pattern changes according to an antenna type and a channel correlation.
In the virtual antenna mapping (VAM) method where a base station transmits information about VAM patterns and receives feedback from a terminal, the VAM pattern changes based on the antenna type (e.g., cross-polarized, co-polarized) and the channel correlation (how similar the channels are between different antennas). For example, in a highly correlated channel, a VAM pattern that utilizes a subset of antennas may be selected.
7. The method of claim 1 , wherein the VAM pattern has a subarray partition type characterized in mapping the TXRUs and the RS by binding multiple antennas into several sets.
In the virtual antenna mapping (VAM) method where a base station transmits information about VAM patterns and receives feedback from a terminal, the VAM pattern has a "subarray partition" type. This type maps transceiver units (TXRUs) and reference signals (RS) by grouping multiple antennas together into sets. Each set of antennas is treated as a subarray, and the VAM pattern defines how these subarrays are used.
8. The method of claim 1 , wherein the VAM pattern has a Full connection type characterized in mapping the TXRUs and the RS by redundantly using multiple antennas.
In the virtual antenna mapping (VAM) method where a base station transmits information about VAM patterns and receives feedback from a terminal, the VAM pattern has a "Full connection" type. This type maps transceiver units (TXRUs) and reference signals (RS) by redundantly using multiple antennas. This allows for diversity and improved signal quality.
9. A virtual antenna mapping (VAM) method of a terminal communicating data with a base station equipped with M physical antennas and Q transceiver units (TXRUs), the method comprising: receiving information on at least one VAM pattern, each VAM pattern being associated with mapping between at least one physical antenna and at least one data stream; estimating a channel based on a reference signal (RS) transmitted by the base station; selecting a VAM pattern among the at least one VAM pattern based on a channel measurement result with respect to the estimated channel; and transmitting, to the base station, a feedback including information regarding the selected VAM pattern.
A terminal communicates with a base station that has M physical antennas and Q transceiver units (TXRUs). The terminal receives information about one or more virtual antenna mapping (VAM) patterns from the base station. Each VAM pattern specifies how data streams are mapped to physical antennas. The terminal estimates the channel based on reference signals (RS) sent by the base station. Using channel measurements, the terminal selects a VAM pattern from the available patterns. Finally, the terminal sends feedback to the base station, indicating the selected VAM pattern.
10. The method of claim 9 , wherein the feedback is transmitted periodically at a feedback transmission interval that is determined based on at least one of a network status, a channel status, and a performance change caused by a change of the VAM patterns.
The virtual antenna mapping (VAM) method from the previous description, where a terminal receives VAM pattern information and sends feedback to a base station, has the terminal transmit feedback periodically. The time between transmissions is determined by network status, channel status, or performance changes caused by VAM pattern changes. For instance, the feedback interval might be shortened when the channel is varying quickly.
11. The method of claim 9 , wherein the feedback is transmitted aperiodically in response to a request of the base station or when a VAM pattern information feedback event occurs at the terminal.
The virtual antenna mapping (VAM) method from the initial description, where a terminal receives VAM pattern information and sends feedback to a base station, involves the terminal sending feedback aperiodically. This can happen either when the base station requests feedback or when a specific VAM pattern information feedback event occurs at the terminal, indicating a need for the base station to update its VAM configuration.
12. The method of claim 9 , wherein the VAM pattern is selected based on at least one of a channel gain, a transmit diversity gain, a minimum channel quality, a channel capacity, a Signal-to-noise ratio (SNR), and an antenna interval, wherein transmitting the feedback comprises: retrieving an index corresponding to the selected VAM pattern from a VAM table; acquiring information regarding a largest resource measurement value by measuring a plurality of channel measurement resources; and transmitting the feedback including the index to the base station, and wherein the VAM table includes the at least one VAM pattern and the index corresponding to the at least one VAM pattern, and the VAM table is determined based on at least one of feedback overhead, number of bits used for feedback, number of antennas, antenna structure, antenna correlation, and channel correlation.
In the virtual antenna mapping (VAM) method where a terminal receives VAM pattern information and sends feedback to a base station, the terminal selects the VAM pattern based on channel gain, transmit diversity gain, minimum channel quality, channel capacity, Signal-to-noise ratio (SNR), or antenna interval. The terminal then retrieves an index corresponding to the selected VAM pattern from a VAM table. It also acquires information regarding a largest resource measurement value. Finally, the terminal transmits the feedback, including the index, to the base station. The VAM table (containing possible VAM patterns and indices) is determined based on factors like feedback overhead, number of bits used for feedback, number of antennas, antenna structure, antenna correlation, and channel correlation.
13. The method of claim 9 , wherein transmitting the feedback comprises: measuring received signal strength indication (RSSI)/reference signal received power (RSRP)/reference signal received quality (RSRQ) on a plurality of channel measurement resources designated by the base station; selecting a largest resource measurement value; and transmitting, to the base station, the feedback including the selected resource measurement value, the channel measurement resources being configured with index information corresponding to the at least one VAM pattern, the terminal feeding back information regarding respective channel measurement resources and transmitting an index of the resource having a largest resource measurement value among the channel measurement resources.
In the virtual antenna mapping (VAM) method where a terminal receives VAM pattern information and sends feedback to a base station, the terminal measures Received Signal Strength Indication (RSSI), Reference Signal Received Power (RSRP), or Reference Signal Received Quality (RSRQ) on multiple channel measurement resources designated by the base station. The terminal selects the largest resource measurement value and transmits this value to the base station as feedback. The channel measurement resources are configured with index information corresponding to the available VAM patterns, so the base station knows which VAM pattern the feedback relates to. The terminal sends the largest measurement value along with the corresponding index to the base station.
14. The method of claim 9 , further comprising: receiving, from the base station, a signal generated by applying the selected VAM pattern through the M physical antennas; and decoding the data streams using the selected VAM pattern in the transmission mode.
The virtual antenna mapping (VAM) method, where a terminal receives VAM pattern information, selects a pattern, and sends feedback, further includes the terminal receiving a signal from the base station. The signal was generated using the selected VAM pattern through the M physical antennas. The terminal then decodes the data streams using the selected VAM pattern in the transmission mode, matching the base station's encoding scheme.
15. The method of claim 9 , wherein the VAM pattern is one of: a pattern corresponding a VAM pattern matrix V of which non-zero elements are identical in size and in which sums of sizes of elements of respective rows are identical, and a pattern formed by grouping adjacent antennas among the M physical antennas.
In the virtual antenna mapping (VAM) method where a terminal receives VAM pattern information and sends feedback to a base station, the VAM pattern is either: 1) a pattern corresponding to a VAM pattern matrix V where all non-zero elements have the same size and the sum of the sizes of elements in each row is the same; or 2) a pattern formed by grouping adjacent antennas among the M physical antennas.
16. A transmission apparatus for performing virtual antenna mapping (VAM), the apparatus comprising: a transceiver that includes M physical antennas and Q transceiver units (TXRUs); a controller configured to control the transceiver to transmit, to a reception apparatus, information on at least one VAM pattern, each VAM pattern being associated with mapping between at least one physical antenna and at least one data stream, transmit reference signals (RSs) to the reception apparatus, receive, from a terminal, a feedback including information regarding a VAM pattern selected among the at least one VAM pattern based on channel measurement with respect to the RS transmitted, and transmit a signal to the reception apparatus through the M physical antennas by applying the selected VAM pattern.
A transmission apparatus performs virtual antenna mapping (VAM). It includes a transceiver with M physical antennas and Q transceiver units (TXRUs), and a controller. The controller instructs the transceiver to send information about available VAM patterns to a receiving apparatus. Each VAM pattern defines the mapping between data streams and physical antennas. The controller also instructs the transceiver to send reference signals (RSs) to the receiving apparatus. The controller receives feedback from the receiving apparatus indicating which VAM pattern was selected based on channel measurements. Finally, the controller instructs the transceiver to transmit a signal to the receiving apparatus using the selected VAM pattern.
17. The transmission apparatus of claim 16 , wherein the transceiver receives the feedback periodically at a feedback interval that is determined based on at least one of network status, channel status, and performance change caused by change of the VAM patterns.
The transmission apparatus for virtual antenna mapping (VAM) from the previous description, which transmits VAM pattern information and receives feedback from a receiving apparatus, has the transceiver receive feedback periodically. The time between feedbacks is determined by network status, channel status, or performance changes due to VAM pattern changes.
18. The transmission apparatus of claim 16 , wherein the transceiver receives the feedback aperiodically in response to a request of the transmission apparatus or when a VAM pattern information feedback event occurs at the reception apparatus.
The transmission apparatus for virtual antenna mapping (VAM) from the initial description, which transmits VAM pattern information and receives feedback from a receiving apparatus, receives the feedback aperiodically. This happens either when the transmission apparatus requests feedback or when a VAM pattern information feedback event occurs at the receiving apparatus, signaling a need to update the VAM configuration.
19. The transmission apparatus of claim 16 , wherein the VAM pattern information comprises an index corresponding to the selected VAM pattern that is retrieved from a VAM table that includes the at least one VAM pattern and the index corresponding to the at least one VAM pattern and the VAM table is determined based on at least one of a feedback overhead, a number of bits used for feedback, a number of antennas, an antenna structure, an antenna correlation, and a channel correlation.
The transmission apparatus for virtual antenna mapping (VAM) which transmits VAM pattern information and receives feedback from a reception apparatus, the feedback includes an index representing the selected VAM pattern. The index corresponds to a VAM table, stored in both transmission and reception apparatus, that contains all possible VAM patterns. The VAM table's contents (available VAM patterns and indices) are determined based on factors like feedback overhead, number of bits used for feedback, number of antennas, antenna structure, antenna correlation, and channel correlation.
20. The transmission apparatus of claim 16 , wherein the VAM pattern is one of: a pattern corresponding a VAM pattern matrix V of which non-zero elements are identical in size and in which sums of sizes of elements of respective rows are identical, and a pattern formed by grouping adjacent antennas among the M physical antennas.
In the transmission apparatus for virtual antenna mapping (VAM) that transmits VAM pattern information and receives feedback from a reception apparatus, the VAM pattern is either: 1) a pattern corresponding to a VAM pattern matrix V where all non-zero elements have the same size and the sum of the sizes of elements in each row is the same; or 2) a pattern formed by grouping adjacent antennas among the M physical antennas.
21. A reception apparatus for performing virtual antenna mapping (VAM), the apparatus comprising: a transceiver that performs data communication with a transmission apparatus equipped with M physical antennas and Q transceiver units (TXRUs); and a controller configured to control to receive, from the transmission apparatus, information on at least one VAM pattern, each VAM pattern being associated with mapping between at least one physical antenna and at least one data stream, estimate a channel based on a reference signal (RS) transmitted by the transmission apparatus, select a VAM pattern among the at least one VAM pattern based on a channel measurement result with respect to the estimated channel, and control the transceiver to transmit, to the transmission apparatus, a feedback including information regarding the selected VAM pattern, wherein the VAM pattern maps N data streams corresponding to the N logical antennas to the M physical antennas through the Q TXRUs.
A reception apparatus performs virtual antenna mapping (VAM). It includes a transceiver and a controller. The transceiver communicates with a transmission apparatus that has M physical antennas and Q transceiver units (TXRUs). The controller receives information about VAM patterns from the transmission apparatus. Each VAM pattern specifies how data streams map to physical antennas. The controller estimates the channel based on reference signals (RS) received from the transmission apparatus. Using channel measurements, the controller selects a VAM pattern from the available patterns. The controller then tells the transceiver to send feedback to the transmission apparatus, indicating the selected VAM pattern. The selected VAM pattern maps N data streams to the M physical antennas.
22. The reception apparatus of claim 21 , wherein the transceiver controls transmitting the feedback periodically at a feedback transmission interval that is determined based on at least one of a network status, a channel status, and a performance change caused by change of the VAM patterns.
The reception apparatus for virtual antenna mapping (VAM) from the previous description, which receives VAM pattern information and sends feedback to a transmission apparatus, has the transceiver transmit feedback periodically. The time between transmissions is determined by network status, channel status, or performance changes caused by VAM pattern changes.
23. The reception apparatus of claim 21 , wherein the transceiver transmits the feedback aperiodically in response to a request of the transmission apparatus or when a VAM pattern information feedback event occurs at the reception apparatus.
The reception apparatus for virtual antenna mapping (VAM) from the initial description, which receives VAM pattern information and sends feedback to a transmission apparatus, transmits the feedback aperiodically. This happens either when the transmission apparatus requests feedback or when a VAM pattern information feedback event occurs at the reception apparatus, indicating a need for updating VAM configuration.
24. The reception apparatus of claim 21 , wherein the controller is further configured to control to select the VAM pattern based on at least one of a channel gain, a transmit diversity gain, a minimum channel quality, a channel capacity, a signal-to-noise ratio (SNR), and an antenna interval, retrieves an index corresponding to the selected VAM pattern from a VAM table, and transmits the feedback including the index to the transmission apparatus, and wherein the VAM table includes the at least one VAM pattern and the index corresponding to the at least one VAM pattern, and the VAM table is determined based on at least one of feedback overhead, number of bits used for feedback, number of antennas, antenna structure, antenna correlation, and channel correlation.
In the reception apparatus for virtual antenna mapping (VAM) that receives VAM pattern information and sends feedback to a transmission apparatus, the controller selects the VAM pattern based on channel gain, transmit diversity gain, minimum channel quality, channel capacity, Signal-to-noise ratio (SNR), or antenna interval. The controller retrieves an index corresponding to the selected VAM pattern from a VAM table and transmits the feedback (including the index) to the transmission apparatus. The VAM table (containing possible VAM patterns and indices) is determined based on factors like feedback overhead, number of bits used for feedback, number of antennas, antenna structure, antenna correlation, and channel correlation.
25. The reception apparatus of claim 21 , wherein the controller is further configured to control the transceiver to receive a signal generated by applying the selected VAM pattern through the M physical antennas from the transmission apparatus and decodes the data streams using the selected VAM pattern in the transmission mode.
The reception apparatus for virtual antenna mapping (VAM) that receives VAM pattern information, selects a pattern, and sends feedback, the controller is further configured to control the transceiver to receive a signal from the transmission apparatus. The signal was generated using the selected VAM pattern through the M physical antennas. The controller decodes the data streams using the selected VAM pattern in the transmission mode, matching the transmission side encoding.
26. The reception apparatus of claim 21 , wherein the VAM pattern is one of: a pattern corresponding a VAM pattern matrix V of which non-zero elements are identical in size and in which sums of sizes of elements of respective rows are identical, and a pattern formed by grouping adjacent antennas among the M physical antennas.
In the reception apparatus for virtual antenna mapping (VAM) that receives VAM pattern information and sends feedback to a transmission apparatus, the VAM pattern is either: 1) a pattern corresponding to a VAM pattern matrix V where all non-zero elements have the same size and the sum of the sizes of elements in each row is the same; or 2) a pattern formed by grouping adjacent antennas among the M physical antennas.
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November 14, 2017
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